25870249 has 2 divisors, whose sum is σ = 25870250. Its totient is φ = 25870248.

The previous prime is 25870189. The next prime is 25870279. The reversal of 25870249 is 94207852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23088025 + 2782224 = 4805^2 + 1668^2 .

It is a cyclic number.

It is not a de Polignac number, because 25870249 - 2¹¹ = 25868201 is a prime.

It is not a weakly prime, because it can be changed into another prime (25870279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12935124 + 12935125.

It is an arithmetic number, because the mean of its divisors is an integer number (12935125).

Almost surely, 2^25870249 is an apocalyptic number.

It is an amenable number.

25870249 is a deficient number, since it is larger than the sum of its proper divisors (1).

25870249 is an equidigital number, since it uses as much as digits as its factorization.

25870249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 25870249 is about 5086.2804680827. The cubic root of 25870249 is about 295.7559811694.

It can be divided in two parts, 258 and 70249, that added together give a palindrome (70507).

The spelling of 25870249 in words is "twenty-five million, eight hundred seventy thousand, two hundred forty-nine".